From owner-freebsd-stable@FreeBSD.ORG Wed Dec 16 10:55:43 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BA634106566B for ; Wed, 16 Dec 2009 10:55:43 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id 0C5508FC08 for ; Wed, 16 Dec 2009 10:55:42 +0000 (UTC) Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua [212.40.38.101]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id MAA02610; Wed, 16 Dec 2009 12:55:38 +0200 (EET) (envelope-from avg@icyb.net.ua) Message-ID: <4B28BCAA.1010002@icyb.net.ua> Date: Wed, 16 Dec 2009 12:55:38 +0200 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.23 (X11/20091206) MIME-Version: 1.0 To: Marian Hettwer References: <7BA0C6CC-A1D9-49C2-942D-D46C19E9B3CB@mac.com> <5cc508f1797d04d0c64bdba1d4a12ff4@localhost> In-Reply-To: <5cc508f1797d04d0c64bdba1d4a12ff4@localhost> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: Re: update to 8.0-RELEASE --> partition gone X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Dec 2009 10:55:43 -0000 on 16/12/2009 11:28 Marian Hettwer said the following: > Hej Marcel, > > > On Tue, 15 Dec 2009 16:46:27 -0800, Marcel Moolenaar > wrote: >> Yes, if you have ad2a and not ad2s1a, then you have a >> proper dangerously dedicated disk and FreeBSD 8.x will >> work correctly with your disk. >> >> If you installed "dangerously dedicated" and ended up >> with ad0s1a (note the "s1"), then you have an invalid >> partitioning and FreeBSD 8.x will not give you what >> you've been getting on FreeBSD 7.x. Most of the time >> you only need to wipe out the second sector on the >> disk to clean it up and have FreeBSD 8.x also give >> you ad0s1a. >> > okay... but how do I wipe out the second sector? > dd if=/dev/zero of=/dev/ad8 count=1 > would wipe out the first 512 bytes. You need to add seek=1 (or oseek=1, which is the same but a little bit more obvious) to that command. > I'm always confused with sectors vs. > bytes. You are not confused this time, HDD sector is 512 bytes. This is the default dd block size too. -- Andriy Gapon